Natural Substances for the Synthesis of Silver Nanoparticles against Escherichia coli: The Case of Megaphrynium macrostachyum (Marantaceae), Corchorus olitorus (Tiliaceae), Ricinodendron heudelotii (Euphorbiaceae), Gnetum bucholzianum (Gnetaceae), and Ipomoea batatas (Convolvulaceae)

Figure 1

Evolution of the maximum of absorbance of the synthetized nanoparticles from Megaphrynium macrostarchyum, Corchorus olitorus, Gnetum bucholzianum, and Ipomoea batatas during one hour of reaction. Ricinodendron heudelotii mediated silver nanoparticles synthesis requires hours of contact time (magenta). Ag-Corchorus silver nanoparticles absorbances are over 4 a.u. after 20 minutes of reaction.